Ok, had a problem with the 3D printer. The board or something else went wrong, so I got another and my friend installed it. it promptly blew out smoke and stopped working. So order another, repeat, and finally learned the cooling fan was frying the boards.
it is working and I printed out a sample of the new grill and parts that need replaced. The interiors are in a box in the shop. And the graphic design skills are finally improving. I got 4 designs done and might do the Earl Powell car at some point.
These decals are laser printed on paper from ebay. The street cars are on clear and the race decals are on white paper. Not the best method, but affordable for me and I can put a sheet in with each car. The black 922 car is an easy match, as is most of the white on the 21 car. The 48 car I painted with strawberry red rustoleum from Walmart and it matches pretty well. They make a rattle can with primer that works on plastic.

So after the technical issues the new year begins with one final part to mold.
Crossing my fingers and hoping things hold together and this finally gets done.
One problem is that now that I am running Cyclones around the track it sort of feels like I am done. But I want to make the grill better and share it with others.
I should mention that Sven's World of Wheels and Mike's decals were both very generous in granting me permission to rescale some of there work. It was a huge help. Still took some work on the decals but really saved a ton of work and the result is way better than what I could have done from scratch.